Improvement in let-off



G.DRAPBR- LET-OFF FOR LOOMS.

No. 80,534. i Patented Aug. 4, 1868.

gotta $23125 1233mm @ffi.-

Letters Patent No. 80,534, dated August 4, 1868i IMPROVEMENT INLET-DFP-FOB 1300M; i

fittt th11lt Ititmh to in no litters 32mm mm making girl of it: same.

TO ALL REESONS TO WHOM THESE PRESENTS MAY COME:

Be it known that I, Gnonos Dnnrsn, of Hope'dale, of the county ofWorcester, and State of Massachusetts, havc made a new and usefulinvention, having reference to the Let-Off" Mechanism of n Loom forweaving cloth; and I do hereby declare thc'ssme to be fully described inthe following specification, and represented in the accompanyingdrawings, of which- Figure 1 is an elevation, and

Figure 2 an end view of a loom-frame, its sley and yarn-beam, asprovided with my invention; the first of such figures being made toexhibit the yarn-beam side of the frame.

On the sixth of January, A. D. 18-14, a patent was granted to WilliamBrayton, of Warren, of the State of Rhode Island, for an improvedlet-elf motion for regulating the delivery of the yarn in a weavingdoom.

, My invention is similarin some-respects to that of Brayton, althoughdifi'ering therefrom in important particulars, and such particularsIhave hereinafter described. 7 I V In carrying out my invention, Iconnect the spring of the fri ctiomstrap with the lay by means of a rod,or its equivalent, pivoted to the lay. Y

Without the said connection, or its equivalent, the yarn will bedelivered by the beat of the slcy and the strain of the warps at theperiod when the weft is being beaten in.

My combination or invention prevents the delivery of the yarn at thebeat, as under such circumstances the friction on the wheel of thefriction-strap will be increascdrather than diminished. The yarn or warpwill be delivered only when the strain on it is sufiicient to turn theyarn-beam without regard to the beating in of the weft. i f In thedrawings, Adenotes the loom-framo, B the lay, G the yarn-roller or beam,and D the whip-roller.

The said whip-roller has its journals supported in hearings in twoar ns,is a, projecting from a shaft, 6, which extends acrossthe loom, and issustained in hearings in the frame A. i A A. long arm, 0, projectingdown from one end of, the shaft, bears against a spring, (1, which, ator near one end, is fixed to the. girt, e, of the frame A, and at theother to one end of a friction-strap,f, which'gpes partiallyeboutthe-periphery of n wheehg, and is fastened to a stud, k, extended fromthe loom-frame.

The said' wheel'g is fixed on a shhft, 2', on-whoseinner end is a'toothed pinion, k, which engages with the gear I of the yarn-beam? Ared, Z, having-a head, m, at one end, is extended through a hole in'thespring d, and is pivoted or jointed to an arm, n, cxtended irom'oneofthe swords of the lay. I would remark that the arm 0, the shaft 6, andthe arms a'zi, I term the ,operstivelevcf' of the whiproller. The trainof gcars'of'the yarn-beamiineludes the-gear l, the pinion'k, end theshaft 2'.

\ From the above, it will be seen that while the laj is in retreat, thesaid rod 1 willslide back through the spring, andn'hcn' the lay advancesand beats the weft into the warps, the rod will draw upon the spring soas td tighten the friction-strap on its wheel. Thus, with my invention,no delivery of the yarn can take place at the beat of the sley, suchdelivery being due only to the increase of the strain or tension on thewarps that 'may be produced from time to time by othcr'cnnses.

I make no claim to the combination of the friction-strap f, its wheel 9and spring d, with the whip-roller- D, and its operative lever, theynrn-beam O, and the train of gears thereof.

- What I claim, is- I The combination of the connection-rod Z, or themechanical equivalent thereof, with the lay B, and the nicchnnismnpplied to the whip-roller D and the yarn-beam C, such mechanismconsisting-of the friction-strap ,1, its wheel (rand spring d, and theoperative lever and train of gears, as explained.

, a GEORGE DRAPER, Witnesses:

fi H. Enm',

HALE, Jr.

